/*
 * Copyright [2013-2021], Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cmd;

import org.apache.commons.lang3.StringUtils;

public interface ConfigResult {

    boolean hasOption(ConfigArgOption option);

    String getOptionValue(ConfigArgOption option);

    default boolean getBooleanFlag(FlagOption option) {
        String flag = getOptionValue(option);
        if (StringUtils.isEmpty(flag)) {
            if (option.defaultValue == null) {
                throw new IllegalArgumentException("Empty value of option: --" + option.argLong);
            }
            return option.defaultValue;
        }
        flag = StringUtils.strip(flag);
        if (flag.equalsIgnoreCase("TRUE")) {
            return true;
        }
        if (flag.equalsIgnoreCase("FALSE")) {
            return false;
        }
        throw new IllegalArgumentException("Illegal flag string: " + flag + ". Should be TRUE or FALSE");
    }
}
